Kids are pretty accepting of all sorts of living and parental situations. Most of the time, kids are simply concerned with themselves and each other, parents aren't particularly interesting to them.
As long as you're active and meeting other parents and getting along well, there shouldn't be any issues. Here and there, there will probably be an adult blowhard or two that says something that a kid may pick up on, but if they get along well with your kid, shouldn't be a problem. If a parent has a problem with your situation, I sincerely doubt they'd sit a young child down and explain it in great detail to them. Much more likely to be a snide remark that a kid hears. The kid is likely to disregard it (or not understand it).
Helps if you're in an area where bullying is generally frowned upon and stood up to by other parents and kids. For the most part, I think most bullies adapt to whatever "weakness" they perceive in a chosen target. I'd suggest that Body type, clothing brands, hair, facial features, sports teams they like, etc are are more likely targets than picking on a kid because of their parents. (bullies typically look for an immediate gratification, visible to everyone)
